Chapter 28 – Renal Tubular Reabsorption & Secretion

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Across
  1. 2. Active Transport  Na⁺‑driven movement of glucose or amino acids.
  2. 5. Cells  Cells adjusting acid‑base balance by secreting H⁺ or HCO₃⁻.
  3. 7. Densa Cells  Distal tubule cells monitoring NaCl to regulate GFR.
  4. 8. Transport  Movement of solutes between tubular cells.
  5. 10. Point when a solute begins to appear in urine.
  6. 11. Descending Limb  Nephron segment permeable to water but not solutes.
  7. 12. ATPase Pump  Baseline transporter creating sodium gradient for reabsorption.
  8. 13. Hydrogen Exchanger  Transporter exchanging Na⁺ inward for H⁺ outward.
  9. 14. Bulk movement of fluid into peritubular capillaries.
Down
  1. 1. Tubule  Highly metabolic region reabsorbing most filtered solutes.
  2. 3. Cells  Cells that reabsorb Na⁺ and secrete K⁺ in distal nephron.
  3. 4. Maximum  Highest possible rate of solute reabsorption before saturation.
  4. 6. Ascending Limb  Segment actively pumping ions while impermeable to water.
  5. 7. Collecting Duct  Last tubular region regulating water, urea, and acid secretion.
  6. 9. Transport  Movement of solutes through tubular epithelial cells.